Friction-clutch.



. Patented 00L 3|, I899. J. YUCUM.

FRICTION CLUTCH.

(Application filed Apr. 27, 1899.)

(No Model.)

INVENTOH WI TNE SSE 8 A TTORNEY NITED STATES PATENT Fries,

JAMES YOCOM, OF PHILADELPHIA, PENNSYLVANIA.

FRICTION-CLUTCH.

SPECIFICATION forming part of Letters Patent No. 635,835, dated October31, 1899. Application filed April 27, 1899. Serial No. 714,736. (Nomodel.)

To all whom it may concern:

Be it known that I, JAMES YoooM, a citizen of the United States,residing in the city and county of Philadelphia, in the State ofPennsylvania, have invented certain new and useful Improvements inFriction Clutches, of which the following is a full, clear, and exactdescription, reference being had to the accompanyingdrawings,forming apart of this specification.

This invention relates to friction-clutches for shafts, pulleys, and thelike, and it has reference especially to the modification shown anddescribed in my pending application for Letters Patent of the UnitedStates, Serial No. 679,894,, filed May 6,1898, which modification,briefly described, comprises a construction wherein the pulley orrotatable member is mounted on'a sleeve fixed on the shaft and whereinthe clamping plates or disks are arranged at the respective ends of saidsleeve in a manner to be simultaneously movable toward or from theinterposed member through the instrumentality of draw-bolts arranged insaid sleeve, as will be hereinafter particularly set forth and claimed.

In the drawings, Figure 1 is a longitudinal vertical section through apulley embodying my invention. Fig. 2 is an end elevation thereof. Fig.3 is a transverse vertical section as on the line 3 3 of Fig. 1.

A represents a drive-shaft, B a sleeve fixed thereon, and C a pulleyloosely mounted on said sleeve, so as to be freely revoluble thereon.

D D are two clamping plates or disks arranged upon the shaft and at therespective ends of the sleeve. This sleeve is provided with end headsI), having peripheral teeth or projections 19, that register withcorresponding sockets or recesses d in the inner faces of the contiguousdisks, so that said disks though rotatable with the sleeve may be slidtoward and from the opposing sides of the pulley or interposed memberfor the purpose of clamping or releasing the latter, as desired. It willbe obvious that when the disks are brought forcibly against the pulleythe latter will be rigidly connected with the sleeve and shaft, andthereby be positively rotated, and that when the disks are retracted thepulley will be loose.

Extending through perforations b d in the sleeve and disk, respectively,is a series of parallel draw-bolts E, the heads e of which impingeagainst the outer face of the disk D, while the shanks extend outwardlybeyond the disk D. The latter disk is provided on its outer face with anannular flange or projection 01 against which bear shoulders f onsuitably-disposed levers F, through slots f in which levers extend theshanks of the drawbolts. The outer or free ends of the levers lieadjacent to the conical end of a slide G on the shaft and are slightlybowed to receive the end of said slide when it is moved toward thepulley. In that case the flange or projection d affords a fulcrum forthe levers, which perforce move the opposing disk against the pulley andat the same time draw the bolts in a manner to clamp the other diskagainst the pulley.

Enciroling the draw-bolts are springs H, which are contained in socketsin the sleeve, so as to bear against the. opposing disks and tend tospread them apart-2'. a, disengaged from the pulley. Hence when theslide is retracted and the inward pressure upon the disks therebyreleased the springs will retract the disks from the pulley. I

By the foregoing-described construction it will be seen that thedraw-bolts are located very near the axis of the shaft, so as to insurea uniform and effective pressure of the disks against the interposedpulley, that the disks are simultaneously actuated to clamp:

or release the pulley, that no lateral movement or adjustment of thepulley obtains or is required, that the balance of the pulley isunimpaired, and finally that very little space on the shaft is occupiedby the clamping mechanism.

Manifestly the present invention .is applicable to couplings for shafts,the rotatable member between the disks being in that case a disk orwheel which is connected bya yoke with an adjoining shaft.

I claim as my invention 1. The combination,withashaft, of asleeve fastthereon, a freely-rotatable member mounted on said sleeve, parallelplates or disks arranged at the respective ends of said sleeve andmovable toward and from the opposing sides of said member, a series ofdraw-bolts extending through said sleeve and disks, and mechanism foractuating said draw-bolts,substantially as described.

2, The combination, with a shaft, of a sleeve fast thereon, afreely-rotatable member mounted on said sleeve, parallel plates or disksembracing said sleeve and having a sliding connection therewith, aseries of draw-bolts extending through said sleeve and disks, andmechanism for actuating said draw-bolts,substantially as described.

3. The combination,with a shaft, of a sleeve fast thereon provided withtoothed end heads, parallel plates or disks at the respective ends ofsaid sleeve provided with notches or recesses registering with the teethin said heads, a freely-rotatable member mounted on said sleeveintermediate said plates or disks, a series of draw-bolts extendingthrough said sleeve and disks, and mechanism for actuating saiddraw-bolts, substantially as described.

4. The combination,with a shaft, of a sleeve fast thereon, a pulleyrotatably mounted on said sleeve, parallel plates or disks arranged atthe respective ends of the sleeve and rotatable thereby, a slidingconnection between said sleeve and the plates or disks, draw-boltsextending through said sleeve and disks, and mechanism for actuatingsaid draw-bolts, substantially as described.

In testimony whereof I have hereunto affixed my signature in thepresence of two subscribing witnesses.

JAMES YOOOM.

Witnesses:

J OHN R. NOLAN, ANDREW V. GROUPE.

